Rhizomania: New knowledge and production traits of new NS sugar beet hybrid varieties tolerant to this pathogen

Abstract

Rhizomania is caused by Beet necrotic yellow vein virus, which is transferred by the soil-borne fungus Polymyxa betae. Considering the yield reduction rhizomania is economically the most important sugar beet disease today. Reduction of root yield and sugar content can go up to 80%, if the susceptible genotypes are grown on the highly infected soil. In the paper are presented latest data about new virus pathotypes and new sources of resistance to virus and fungal vector. Production traits of latest NS sugar beet hybrid varieties SARA, LARA and DRENA, tolerant to rhizomania are discussed as well.

Rizomaniju šećerne repe izaziva virus nekrotičnog žutila nerava, a prenosilac virusa je Polymyxa betae. Rizomanija šećerne repe je jedno od najdestruktivnijih oboljenja do sada pronađeno i opisano na šećernoj repi. Smanjenje prinosa korena i sadržaja šećera kod osetljivih sorata na zemljištima sa visokim stepenom zaraze može biti i preko 80%. U radu su izneta najnovija znanja o postojanju novih patotipova virusa, a takođe su opisani najnoviji izvori otpornosti prema virusu i prenosiocu virusa Polymyxa betae. Pored ovoga date su detaljne karakteristike novosadskih hibridnih sorti šećerne repe SARA, LARA i DRENA tolerantnih prema ovom oboljenju.